Rumors have been swirling of a new smaller-displacement Cummins diesel for the 2010 Dodge Ram 1500. But until now, nobody had any idea exactly what size the new oilburner would be. According to a sticker spotted under the hood of a 2009 Dodge Ram 1500, the new diesel will displace five liters. What we find particularly funny is that the sticker specifies the air-conditioning refrigerant charge for each of the Ram's available engines, but all the engines have the same charge specification, so the sticker doesn't really need to specify engine displacement in the first place. The heavy-duty Ram 2500 and 3500 are currently available (and evidently will continue to be) with a 6.7-liter straight-six Cummins diesel; the new five-liter mill should be for light-duty Rams, to go up against GM's 4.5-liter Duramax diesel, Ford's 4.4-liter diesel, and maybe even a diesel V8 from Toyota. Whether or not Chrysler will be sharing this engine with Nissan as they are with the Hemi remains to be seen. Let the diesel muscle truck wars begin! [PickupTrucks.com]